Writing instrument



FIG. 1 is a perspective view of a writing instrument;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right elevation view thereof, the left elevation view is a mirror image thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a writing instrument according to another embodiment;

FIG. 8 is a front elevation view of the writing instrument of FIG. 7;

FIG. 9 is a right elevation view of the writing instrument of FIG. 7, the left elevation view of the writing instrument of FIG. 7 is a mirror image thereof;

FIG. 10 is a rear elevation view of the writing instrument of FIG. 7;

FIG. 11 is a top plan view of the writing instrument of FIG. 7; and,

FIG. 12 is a bottom plan view of the writing instrument of FIG. 7.

The broken lines in the drawings illustrate portions of the writing instrument which form no part of the claimed design. 

CLAIM The ornamental design for the writing instrument, as shown and described. 